Title :
Gain-Enhanced 60-GHz LTCC Antenna Array With Open Air Cavities
Author :
Yeap, Siew Bee ; Chen, Zhi Ning ; Qing, Xianming
Author_Institution :
Inst. for Infocomm Res., Singapore, Singapore
Abstract :
The gain of low temperature co-fired ceramic (LTCC) patch antenna arrays operating at 60 GHz is enhanced by introducing open air cavities around their radiating patches. The open air cavities reduce the losses caused by severe surface waves and dielectric substrate at millimeter-wave (mmW) bands. The arrays are excited through either a microstrip-line or stripline feed network with a grounded coplanar-waveguide (GCPW) transition. The GCPW transition is designed so that the antenna can be measured with the patch array facing free space therefore reducing the effect of the probe station on the measurement. The proposed antenna arrays with the open air cavities achieves gain enhancement of 1-2 dB compared to the conventional antenna array without any open air cavity across the impedance bandwidth of about 7 GHz for |S11| ≤ - 10 dB at 60-GHz band.
Keywords :
ceramics; coplanar waveguides; dielectric losses; impedance matching; low-power electronics; microstrip antenna arrays; microstrip lines; millimetre wave antenna arrays; waveguide transitions; GCPW transition; LTCC patch antenna arrays; bandwidth 60 GHz; conventional antenna array; dielectric substrate; free space; gain 1 dB to 2 dB; gain enhancement; gain-enhanced LTCC antenna array; grounded coplanar-waveguide transition; impedance bandwidth; losses; low temperature co-fired ceramic patch antenna arrays; microstrip-line; millimeter-wave bands; mmW bands; open air cavity; probe station; radiating patches; stripline feed network; surface waves; Antenna arrays; Antenna measurements; Arrays; Cavity resonators; Gain; Microstrip; Substrates; 60 GHz; arrays; low temperature co-fired ceramic (LTCC); millimeter wave antennas; surface waves;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2161549
